1/*	$NetBSD: ipip_var.h,v 1.6 2018/04/22 10:25:40 maxv Exp $	*/
 2/*	$FreeBSD: ipip_var.h,v 1.1.4.1 2003/01/24 05:11:35 sam Exp $	*/
 3/*	$OpenBSD: ip_ipip.h,v 1.5 2002/06/09 16:26:10 itojun Exp $ */
 4/*
 5 * The authors of this code are John Ioannidis (ji@tla.org),
 6 * Angelos D. Keromytis (kermit@csd.uch.gr) and
 7 * Niels Provos (provos@physnet.uni-hamburg.de).
 8 *
 9 * The original version of this code was written by John Ioannidis
10 * for BSD/OS in Athens, Greece, in November 1995.
11 *
12 * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
13 * by Angelos D. Keromytis.
14 *
15 * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
16 * and Niels Provos.
17 *
18 * Additional features in 1999 by Angelos D. Keromytis.
19 *
20 * Copyright (C) 1995, 1996, 1997, 1998, 1999 by John Ioannidis,
21 * Angelos D. Keromytis and Niels Provos.
22 * Copyright (c) 2001, Angelos D. Keromytis.
23 *
24 * Permission to use, copy, and modify this software with or without fee
25 * is hereby granted, provided that this entire notice is included in
26 * all copies of any software which is or includes a copy or
27 * modification of this software.
28 * You may use this code under the GNU public license if you so wish. Please
29 * contribute changes back to the authors under this freer than GPL license
30 * so that we may further the use of strong encryption without limitations to
31 * all.
32 *
33 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
34 * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
35 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
36 * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
37 * PURPOSE.
38 */
39
40#ifndef _NETINET_IPIP_H_
41#define _NETINET_IPIP_H_
42
43/*
44 * IP-inside-IP processing.
45 * Not quite all the functionality of RFC-1853, but the main idea is there.
46 */
47
48#define	IPIP_STAT_IPACKETS	0	/* total input packets */
49#define	IPIP_STAT_OPACKETS	1	/* total output packets */
50#define	IPIP_STAT_HDROPS	2	/* packet shorter than header shows */
51#define	IPIP_STAT_QFULL		3
52#define	IPIP_STAT_IBYTES	4
53#define	IPIP_STAT_OBYTES	5
54#define	IPIP_STAT_PDROPS	6	/* packet dropped due to policy */
55#define	IPIP_STAT_SPOOF		7	/* IP spoofing attempts */
56#define	IPIP_STAT_FAMILY	8	/* protocol family mismatch */
57#define	IPIP_STAT_UNSPEC	9	/* missing tunnel endpoint address */
58
59#define	IPIP_NSTATS		10
60
61#ifdef _KERNEL
62extern	int ipip_spoofcheck;
63#endif /* _KERNEL */
64#endif /* !_NETINET_IPIP_H_ */